Autogenous burner.



E. WISS.

AUTGENOUS BURNER.

APPLIGATION FILED JULY 1o4 1914.

llvglglge Pafentad Dec.15,1914.

rra srafrns armar carmen.

ERNST VISS, OF GRIESHEIM, GER-MAN Y. ASSIGNOR TO CHEMISCHE FABRIK GRIES HEIllI-ELEKTRON, OF FRANKFORT-OlT-THE-BLAIN, GERMANY, A CORPORATION OFV GERMANY.

AUTOGENOUS BURNER.

To all whom t may concern Beit lnioWn that I, ERNST W'iss, a'subject of the German Emperor, and resident of' Griesheim-on-the-Main, Germany, have invented certain nenT and` useful Improvements in Autogenous Burners, of which the following is a specification. i

My invention relates to improrei'iients in antogenous burners for cutting metals. ln burners ot this class one part ot-the oxygen is supplied to the preheating flame, and the remainder is used for cutting the metal, and ordinarilytwo separate conduits are provided for supplying the oxygen for both purposes. Efforts hare heretofore been made to supply the oxygen through a single conduit, which edorts however have been unsatisfactory, for the reason that when opening the yalye tor taking vfrom the oonduit the oxygen forcutting the pressure ot the oxygen Within the conduit is reduced so that the heating cite-ct of the pre.- heating flame is impaired. For this reason it is necessary to supply the oxygen under an excessive pressure, or a pressure which is higher than is necessary for obtaining the best heating etlect as long as no oxygen is' taken tor cutting, and which is reduced to the proper degree by opening thc yalre for taking the oxygen for cutting.

The object of the improvements is to provide a burner in which the oxygen for supporting combustion, and the oxygen tor cutting the metal are supplied through a single conduit,v and in lWhich notwithstanding this there is no reduction olI pressure ot' the oxygen when opening the valve for supplying oxygen for cutting to the metal.

With this object in rienY my invention consists in so constructing the supply conduit that the oxygen coming from the main conduit is directed toward the reduced inlet end of the pipe tor supplying oxygen to the preheating flame, so that a pressure :ione is produced at the inlet end hy the kinetic energy ot' the oxygen, While the oxygen for the cutting flame is taken from the supply conduit in such a Way, that the said pressure zone Which acts` on the passage for the oxygen supplied to the preheating flame is not affected by taking the oxygen tor the cutting flame. This result may be obtained in a simple Way by directing the incoming current of oxygen in a continuous current With its central part against the inlet end Specification of Letters Patent.

Patented Dec. 15, 1914.

Serial No. 850,224.

of the pipe for supplying the heating oxygen and withdrawing the oxygen for cutting from the outer part of the said pressure zone, so that the central part of the pressure zone is not affected.

In order that my invention be more clearly understood two examples embodying the same have been shown in the accompanying drawing, in Which- Figurel, is a section of the burner embodying the invention, and Fig. 2, is a section of a detail showing a modification of the burner.

Referring to the example.v illustrated in Fig.4 l, the supply pipe O for the oxygen extends into a cylindrical casing` l? providing an annular chamber surrounding the pipe O, The current ol oxygen which is discharged frm the pipe O is directed toward the'concentric inlet end of the pipe O, for supplying oxygen to the preheating flame;

For increasing the velocity ot the current of oxygen the discharge end of the pipe O is preferably reduced so as to form a nozzle. The oxygen coming from the pipe O produces a pressure Zone the central part of which bears on the inlet end ot the pipe OL.. When openingl the valve V of the pipe i, the oxygen flows from the annular chamber surrounding the pipe (Y) and into the pipe O1. Thereby the pressure at the circumference ot the pressure zone is reduced. But the central part of the pressure zone which is adjacent to the inlet end of the pipe O2 is not affected by the reduction ot' the pressure, so,that the heating eilect ot' the preheating flame is not impaired. Preferably the inlet end of the pipe O2 is obstructed by a disk D haring au opening of suitable size tor admitting the proper amount of oxygen to the pipe O2. The oxygen loiring through the pipe 02 is mixed Within a mixine chamber K with hydrogen which issuppiied through a pipe H,

is known in the art, The mixture ot' hydrogen and oxygen Hows through a pipe communicating with the chamber K and an annular chamber It to the discharge of the burner head. lVhen the VValve "J is open the oxygen for cutting flows through the pipe O1 and the central cutting pipe S, ot' the burner head.

In the example shown in Fig. 2 the. pipe O for supplying the oxygen is solong that it abuts against the inlet end of the pipe O2 for supplying the oxygen to the heating ame, and the dislr D is used for closing the discharge end of 'the pipe O as against the' A annular chamber P. The chamber l? communicates with the supply pipe O through apertures Q provided in the pipe O. Also in this example a pressure zonev is produced in front of the pi 9e O2 the central part of which acts on the inlet end to the pipe O2 and is not aected by the flow of the oxygen escaping through the apertures Q after opening the cutting valve V.

While in describing the invention reference yhas been made to the` distribution of oxygen flowing through a supply pipe, l Wish it to be understood, that my invention is not limited to the use of the apparatus in connection With oxygen. For eXample the invention can be embodied in burners for cutting thick metals, 'which are ,provided apart from the burner for producing a main flame with a subsidiary burner acting on the metal after the main burner, in which case the gas for the main flame and thegas for the subsidiary fla-me are taken from' a single Supply pipe An important feature of my invention consists in the fact, that by means of the same disk D for regulatingthe amount of I the oxygen supplied to the ilame metals can be cutthe thicknesses of which vary Within broad limits. ln this respect my improved apparatus is preferable as compared to ap' paratus in Whiclntwo separate tubes are' provided for supplying .the oxygen, Yand in which according to the thickness of the metal several burner heads having-different bores or diderent injectors must be used.

l claim herein as my invention:

l; In an autogenous burner for cutting metal, the combination of asupply conduit for the oxidizing gas, a casing surrounding the discharge' end `of'said conduit, ya mixing chamber receiving oxidizing gas from' said 4supply conduit, a conduit for a combustible gas communicating With the mixing chain- -ber, and a conduit for the oxidizing gas leading from said casing, said parts being so constructed and arranged that the current of oxidizinggas' is divided at the discharge end of 'said supply conduit into streams passing into said casing and-to said chamber. 2.111 an autogenous burner for cutting metal, the combination With-afsupplylcon duit for the oxidizing gas, of .a -mix'ing chamber communicating with said conduit, a conduit for a combustible'gas communicating With'the mixing chamber, aconduit for the gas adapted to eiiect the cutting, and automatically regulating means for supplying the last said conduit from the oxidizing gas supply conduit Without reducing'the of gas through said hole will tively small outlet that has communicationl with the mixing chamber, a conduit for combustible gas having communication with the mixing chamber independently of the means whereby lsaid outlet communicates with said chamber, and a conduit leading from said casing directly to the burner.

4. In an autogenous burner for cutting metal, the combination of a burner head, a

lmixing chamber communicating With the head, means for-supplying a combustible gas to the mining chamber7 a supply pipe for the oxidizing gas, and independentl means for conveying gas from the discharge end' of the last ,said pipe to the mixing chamber and directly 'to the burner, said parts being so arranged that the direct supply of oxidizing gas to the burner does not effect substantial variation in the pressure of said gas supplied to the mixing chamber.

5. ln an autogenous burner for cutting metal, the combination of an oxidizing gas supply conduit provided with an outlet` nozzle, a casing surrounding said nozzle and having a restricted outlet in alinement with the nozzle, a mixing chamber havingl coinmunicationvith said outlet, a conduitl for combustible gas leading to said mixing chamberA .and Wholly 4independent of the means whereby said outlet 'communicates With said chamber, and a conduit :tor` theV cutting gas suppliedfrom said casing.`

6. In an apparatus'of the class described, the combination with the supply pipe for a current of gas, of a passage oi' reduced cross sectional area, as compared With said supply pipe, disposed infront 'of the dischargeend of said pipe, and havingl a hole therein located centrally insaid passage, a casing adapted to receive the gas from the 'dis- .charge end of said pipe, and 'meansfor Withdrawing' a current of the gas, discharged from said pipe, from said casing at a point remote from said passage, whereby the flow y not be'reduced by the branch current. l l

ln testimony whereof "I, have signed my name to'this specification in thepresence of two subscribingV Witnesses.

1 n ERNST WISS. Witnesses: JEAN GRUND, CARL'GRUND.

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